Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae4a78918f0f4888…

MALICIOUS

PDF

112.9 KB Created: 2021-03-20 00:47:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 3dcf856b7c03f8e52180a65765dd60cd SHA-1: 56d8ef5bead65a2ffb3169ae7bef98032991844a SHA-256: ae4a78918f0f4888a5db7c2395067f62c1f9859fd12e8290b780685b7084d33f
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://zajinet.ru/strik?utm_term=bram+stoker+dracula+movie+cast PDF link annotation
    • http://setirexude.22web.org/doorking_1837_user_manual.pdfIn PDF document text
    • http://bevarep.22web.org/as_bases_quimicas_da_vida.pdfIn PDF document text
    • http://rarubife.mygamesonline.org/tegumuxame.pdfIn PDF document text
    • http://xegisepereti.mygamesonline.org/romutisalavowutigovunumej.pdfIn PDF document text
    • http://pugezesiw.mygamesonline.org/46035239165.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lonuduvikis.epizy.com/fluke_115_multimeter_datasheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1f6397d-215e-4fc3-8473-cbf631c7f3e8/37206789844.pdfIn PDF document text
    • http://sonowodiguvab.epizy.com/6528547024.pdfIn PDF document text
    • https://a1d1c4ac-cf1d-4c58-861c-45d1188f4b60.filesusr.com/ugd/052f3a_87b9214714c94b6ab141f4d3b5a8db89.pdf?index=trueIn PDF document text
    • https://5ec50ee2-6c76-415b-b731-82d7de26534b.filesusr.com/ugd/826e74_f0bf3a040e43402f911e0c4e4d6e17f8.pdf?index=trueIn PDF document text
    • https://c183b790-cb34-49aa-848e-1a9f2b14dda3.filesusr.com/ugd/d8966e_b98debaa4c314494a257fdd8b5fc627c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rafiralexezol/abdul_kalam_biography_in_hindi_download.pdfIn PDF document text
    • http://tosopipates.epizy.com/badlapur_hd_video_song_pagalworld.pdfIn PDF document text
    • https://s3.amazonaws.com/puretulenuza/tamere.pdfIn PDF document text
    • https://c948e902-2437-43f3-9f1e-7aaad30688a7.filesusr.com/ugd/464a75_9a5cf09d2f3945af845db1aa32cbde9f.pdf?index=trueIn PDF document text
    • http://nepupiborama.rf.gd/lunuwenipe.pdfIn PDF document text
    • https://s3.amazonaws.com/mefadedosuw/serial_killer_movie_in_tamil.pdfIn PDF document text
    • http://benebobuku.epizy.com/tapping_auto_clicker_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/lerezazo/how_to_make_a_kitten_friends_with_a_dog.pdfIn PDF document text
    • http://pidulenumasan.epizy.com/carbon_nanotubes_free_download.pdfIn PDF document text
    • http://vofuwelezetez.rf.gd/95629339242.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eac0e239-1e6e-4429-8d6b-715a0eaa974f/vivanupupupisexukit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d39b88dd-e3f6-44bd-93a0-bd2e6ef37ef1/android_development_kit_hardware.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001784f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1784F 5256 bytes
SHA-256: dd303f666e85d1bad39af5b76ea1e840c7efa7730262b1ce5f36817dfa5354e8
font_01_sfnt_off00018a21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18A21 13208 bytes
SHA-256: b0caf579eed2fe67deb5b3e7feeb287b8e27a1ef1745c570b123336dc5e43a91

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